199354249 has 2 divisors, whose sum is σ = 199354250. Its totient is φ = 199354248.

The previous prime is 199354247. The next prime is 199354369. The reversal of 199354249 is 942453991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128255625 + 71098624 = 11325^2 + 8432^2 .

It is an emirp because it is prime and its reverse (942453991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199354249 - 2¹ = 199354247 is a prime.

Together with 199354247, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 199354199 and 199354208.

It is not a weakly prime, because it can be changed into another prime (199354247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99677124 + 99677125.

It is an arithmetic number, because the mean of its divisors is an integer number (99677125).

Almost surely, 2^199354249 is an apocalyptic number.

It is an amenable number.

199354249 is a deficient number, since it is larger than the sum of its proper divisors (1).

199354249 is an equidigital number, since it uses as much as digits as its factorization.

199354249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 46.

The square root of 199354249 is about 14119.2864196460. The cubic root of 199354249 is about 584.1734732438.

The spelling of 199354249 in words is "one hundred ninety-nine million, three hundred fifty-four thousand, two hundred forty-nine".